By contrastive analyses of some dimensional and tolerance design methods used in mechanical engineering design, a new dimension and tolerance design method by M onte Carlo method was developed.

• 通过对机械工程设计中所采用的几种尺寸及公差设计方法的对比分析,提出了应用蒙特卡洛仿真法进行尺寸及公差设计的新方法。